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Dry Cooling - Air Cooled Condenser (ACC)Based on more than 60 years of direct experience and research, GEA has developed and optimized fin tube systems with features particularly beneficial to the operation of vacuum steam condensers. GEA’s ACC technologies combine compact surface requirements with low energy consumption to make the system as efficient as possible. The GEA air-cooled condenser (ACC) is comprised of fin tube bundles grouped together into modules and mounted in an A-frame configuration on a steel support structure. V-frame, vertical and horizontal configurations are also available. GEA employs a two-stage, single-pressure condensing process to achieve efficient and reliable condensation. In this process, the steam is first routed from the steam turbine to the air-cooled condenser where it enters parallel flow fin tube bundles from the top. Non-condensibles are drawn off above this point by ejection equipment. The condensate drains by gravity to a condensate tank and is then pumped back to the feedwater system. GEA offers a number of different heat exchanger surfaces. Most commonly supplied are the hot-dipped galvanized, two-row fin tube bundles (A-tube) and the aluminum-finned, single-row fin tube bundles (ALEX). Based on project parameters and customer preference, GEA will utilize the fin tube bundle design that provides the most economical and efficient solution possible. When a high value is placed on fan power consumption or when extreme low noise emission is required, GEA’s ALuminum EXchanger (ALEX) technology will be the most economical solution. Schematics ACC Schematic
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Downloads
Air Cooled Condensers Brochure
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GEA Heat Exchangers | GEA Power Cooling Inc.
Reliability
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The steam is only partly condensed in the parallel flow modules. The remaining steam is routed through lower headers to counterflow fin tube bundles. Here, the steam enters from the bottom and rises in the fin tubes to a point where condensation is completed.